SAT MATH Solving Proportions

#shorts
One of the more confusing proportion questions on the SAT. I like to read the question first to see what I have to look for in the problem.

In a study of bat migration habits, 240 male bats and 160 female bats have been tagged. If 100 more female bats are tagged, how many more male bats must be tagged so that 3/5 of the total number of bats in the study are male?

[anjalidwivedi]

I thought of another way to solve it
since total female bats are 160+100=260
and we want the male bats to be 3/5
female should be 1-(3/5)=2/5
since female are 260
so 260 = 2/5
this we get 1/5=130 we want 3/5 for male so 3/5 = 3*(1/5)
= 3 * 130
= 390
current male bats are 240
we want that to be 390 to get male as 3/5
so we want 390 - 240 = 150 more male bats
thus our answer 150
hope it helps
have a nice day 😊😊

[vash]

Let the total female bat to be 40% or 2/5, knowing its 260, 260/4 is 65 = 10% of overall bats.

Overall bats is 650,
650-260-240 = 150 male bats to be added

[matthewec]

A really long, yet surefire way to get the answer

I was thinking to just look at the total females, which will be 160+100 = 260
Now, if we want males to be 3/5
Then the females has to be the remaining 2/5

Which means that 2 is represented by 260
2 : 260
1 : 130

For males (3/5)=
1 × 3 : 130 × 3
3 : 390
Total males will be 390
Males we need to add = 390-original male num
= 390-240 = 150

[jackionendino]

I got the answer by adding 100 to 160 so 260 divide 2( the ratio of female) got 130 then multiply by 3 so 390-240(original number of male) then i have 150. But I love how you use algebraic equation and I want to learn about maximizing the use of it

[fwie]

Man, that's smart. Lol i had to convert things into percents just to get the right answer 😂😂.